import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class TwoNumberSum {
    public static void main(String[] args) {
      Scanner in=new Scanner(System.in);
      int n=in.nextInt();
      int []a=new int[n];
      for(int i=0;i<n;i++){
          a[i]=in.nextInt();
      }
      System.out.println(Arrays.toString(a));
      int target=in.nextInt();
      System.out.println(Arrays.toString(method(a,target)));
    }

    public static int[] method(int[] nums,int target){
        int n=nums.length;
        int []res=new int[2];
        if(nums==null || n==0){
            return null;
        }
        HashMap<Integer,Integer> map=new HashMap<>();
        for(int i=0;i<n;i++){
            int tmp=target-nums[i];
            if(map.containsKey(tmp)){
                res[0]=i;
                res[1]=map.get(tmp);
            }
            map.put(nums[i],i );
        }
        return res;
    }
}
